Pipe threading and cutting tool



C. G. NORMAN.

PIPE THREADING AND CUTTING TOOL.

' APPLICATION FILED MAR. I5. 1918.

. 1,314, 92, Patented Sept. 2, 1919.

Q 5 fly 26:9

THE COLUMBIA PLANOGRAPH 60., WASHINGTON. n. c.

CARL G. NORMAN, OF FARGO, NORTH DAKOTA.

PIPE THREADING AND CUTTING TOOL.

Specification of Letters Patent.

Patented Sept. 2, 1919.

Application filed March 16, 1918. Serial No. 222,965.

To all whom it may concern:

Be it known that I, CARL G. NORMAN, a citizen of the United States, residing at Fargo, in the county of Cass and State of North Dakota, have invented certain new and useful Improvements in Pipe Threading and Cutting Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an extremely simple, compact and highly efiicient combination pipe threading and cutting tool preferably having also a reamer attached thereto and especially adapted to be carried in a satchel, or the like, for use by plumbers and other workmen in doing small jobs or making repairs in dwellings, buildings, or other places away from the shop or headquarters.

Hitherto, it has been necessary to carry several tools to accomplish the above work, for example, it has been the custom to carry a pipe threader including the stock, pipe cutter and pipe reamer, and it has often also been necessary to carry a vise. Such a combination of tools are heavy and cannot be easily carried from job to job. My invention provides a single tool which may be quickly and easily attached to a post or wall or a bench, and by the use of which, pipe threading, 'cuttin and reaming may be readily accomplished with all the facility required for small job work.

In the accompanying drawings which illustrate the invention in its preferred form, like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a side elevation showing the improved combined tool applied in working position;

Fig. 2 is a horizontal section on the hne 2-2 of Fig. 1;

Fig. 3 is a vertical section taken on the line 3 3 of Fig. 1, some parts being removed; and

Fig. 4 is a detail of one of the bushings.

The tool comprises a rectangular hollow body portion 5 having a base flange 6 and a laterally extended tu e 7. The base flange 6 is ada ted to be secured by screws 8 or other sultable devices, to a convenient support, such as a post 9. For the reception of the sleeve 7 and with a large perforation 12 w formed in the rear wall of the said body 5. The outer end of the sleeve 7 is internally threaded at 7 and inward of said threads, the interior of said sleeve is enlarged at 7*.

.In the upper portion of the enlargement 7 is an oil hole 13. The die seat 11 extends below the lower portion of the enlarged inter or 7 and is provided in its front wall, ad acent to its bottom, with a discharge passage 14, through which latter, chips and oil will run out under the action of gravity. This passage 14, it will be noted, also extends forward in front of the lower portion of the die 10 and into the enlargement 7 so that the oil and chips which run down the front face of the die may directly escape through said passage 14. Rigidly se cured to the front flange of the body 5 just below the sleeve 7 is a tapered reamer 15 onto which oil will run from the passage 14.

The numeral 16 indicates a bushing which is externally threaded and is screwed into the threaded end 7 of the sleeve 7. This bushing is provided with a plurality of circumferentially spaced radial set screws 17 that adapt the said bushing to be rigidly secured to a pipe 18, the end of which is to be threaded. The threaded bushing 16 is especially desirable for threading large pipes, but for threading smaller pipes, a smaller threadless bushing 19 may be substituted in the sleeve 7 for the bushing 16. To secure this bushing 19 in the sleeve, the latter is shown as provided with a set screw 20.

In combining the pipe cutting tool with the treading tool, the body 5 is preferably formed with a strong projecting arm 21, which, at its outer end, has an upwardly projected hub 22 through which a feed screw 23 works with threaded engagement. This screw 23, at its outer end, is provided with a transverse head 24 which is engaged with the end and may be used to force the screw with the required power. The inner end of the feed screw 23 engages the free upper end of a bifurcated lever 25. A sharp edged pipe cutting wheel 26 is located in the bifurcated upper end of the lever 25 and pipe properly is journaled thereto by a short spindle 27. F or cooperation with the cuttingwheel26, a pair of vertically spacedbeari'n'g" rollers 28 are journaled to the body 5, the latter being provided with recesses that're'cei'v'e all but small portions ofthe said. rollers.

The pipe t'obecut will be placed'aga'inst the rollers 28 and the cutting wheel 26 will be forced against the pipe by the feed screw 23; Thispipe cuttingl operationis, o-fcourse, well understood.

Of-course,-pipe threading dies of dilferent size will be provided and these may beinterchangeably usedin the seat 12.

In cutting large pipes, it is frequently diflijcult to producethe initial threading action, that is, to" get the pipe started into the die so that the thread cutting action can-be properly continuedby rotation of the pipe. This annular threading action, however, will be positively exerted when the pipe, bythe set screws 17 ,clamped to the sleeve 16 and the pipe and sleeve then rotated together.- In' this action, the threads on the sleeve andbushing give the pipe that endwise movement which will insure its travel into the cutting teethof the die. The threaded engagement between the bushing and sleeve corresponds to the threads of the die, but even where thereis some variation in these threads, the initial action can be started and then. the completion of the thread produced by rotating the pipe while it is released from the bushing; 16.-

In cuttingsmaller pipes, when the bushing 19 is used, the bushing simply holds the alined with the die. The bushinglo, on the other-hand, not only holds the pipe alined with thediebut imparts an axial movement thereof. When a pipe is out off by'the pipe cutter, a bur will be formed on the interior oiithe cut endand this may be moved by placing that end of the pipe against the reamer- 15 and then rotatingthe said pipe. Here attention is again called to the fact that oil running from the die seat throughthe passage14, will keep the l'eamef 15 lubricated:

- The above described combination tool is of small size and light, and moreover, may be constructed at comparatively small cost. It will perform the work hitherto requiring several: independent tools and is, therefore,

an exceedingly useful tool for the purposes had in vlew.

This important tool will weigh less than five, pounds and it takes" the place of a multiplicity of tools, the Weight of which will be about thirty-five orfortypounds. I

am able to efEect this saving in weight largely because I have reversed the-usual operation.

That is,-it has been customary to hold the I pipe in a vise and rotate the threading or cuttingtool around the same," whereas my important device is anchored andthepipe is rotated;

hatlclaimisr 1 The-combination with a hollow' rectangular body formedwith a die seat,-wit'h an anchoring fiange and with a laterally progecting sleeve, of a bushing in said sleeve, a

die removably mounted in said die{seat,-and

die-removably mounted in saiddie seat, the

said body, at the bottom of said sleeveand die seat havingia passage for the escape of oil and-chips.

In testimony whereof I afliX my signature in presence of two witnesses.

GARL Gr.- NORMAN.

Witnessesn v 1 HARRY DQKILGOKE," F.-D; MERCHANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D 0.?" 

